Lock



May 25 1926. 1,586,471

D. ROBERTI LOCK Filed April 5. 1923 IS Sheets-Sheet l I INVENTOR.

' TTORNEY.

May 25,1926. 1 1,586,471

D. ROBERT! A LOCK Filed April 5. 1923 3 Sheets-Shea}; 2

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[i221 DHRIQROBERT/ ITCH I II 1 L BY l D. ROBERTI May 25 1926.

LOCK

Filed April 5. 1 923 3 Sheets-Shoot 3 Patented May 25, 1926.

"UNITED STATES PATENT OFFICE.

DARIO ROBERTI, OF SPRINGFIELD, MASSACHUSETTS.

ram of the lock-and parts partially sepa- LOCK.

Application filed April 5, 1923. Serial No. 630,162.

. This invention refers to looks and more particularly to combination locks for use with doors for buildings. Some of its objects include the provision of the following features:

To have a in question and yet not take up any more room than an ordinary lock.

To have the lock adaptable for a large number of combinations.

To have it adaptable as an ordinary lock.

To have the lock in sections, each of which p VGIltlOll 15 shown mounted in a door 1, havcan be made, and inspected or repaired independently of the other.

To have it provided with features to prevent tampering by unauthorized persons.

And many other objects which will become apparent as the invention is more fully set forth. I

Combination or permutation locks are not ordinarily adapted for use with ordinary building doors because of their elaborate and cumbersome construction, and the difficulty of arranging their parts to come where 'they could be actuated from the front or back of a door. This invention not only provides fora-ll the features that are met with in doors for locks, but in addition can be used as. an ordinary lock readily, to be reset as a combination lock at a moments notice- The lock is keyless and has the appearance of an ordinary lock, with handle and latch.

The lock is provided with its locking mechanism in one unit, and itsoperating mechanism in another so that each may be separated from the other.

. In the drawings:

Figure 1 is a front elevation of a lock embodying this invention as seen from the front of the door inwhich it is located.

Figure 2 is a side elevation of Figure 1. p.

.used for the same purpose as button 6. This plate also has a resilient push key 15 Figure 3 is a rear elevation of thelock. Figure 4 is a view through'the lock looking behind the front plate.

Figure 5 is a view looking through the rear faceplate of the lock.

Figure 6 is an enlarged detail in perspective of-parts indicated in Figure 5.

Figure 7 is a side elevation indicating the puslibutton mechanism of the lock.

Figure 8 is a detail of the latch parts of the locking perspective. I

Figure 9 is a detail in perspective and diaratedand with alarm attaclnnent,

lock adaptable for the purpose Figure 10 is a diagrammatic view of the ing the usual slots and holes for the lock parts that require them. '1

The lock consists of five main elements, namely: a front plate 52, secured to the front detail of therack and set.

of the door 1 with screws 3;, a rear plate 8 on the back of the door secured with screws 8; an inner casing 12 within the lock slot of the door; a false section 19 insertable in the inner casing; the 'operating'parts and devices consisting of push-buttons and the like; and handle parts for operating the latch mechanism of the lock.

The front plate 2 is provided with a door I knob 7 and the bar for the same passes through to the other side of the door to another similar knob 7 in the usual manner. Several push buttons 4 resiliently project from the plate '2 and are provided for functioning as the motive part for actuating the operative mechanism of the look. A special resilient push key 5 is also mounted on this plate and serves to release the permutation parts of the'lock.

when necessary.

A push button 6 is alsoprovided on this It is nreferablv provided withsome means for looking it pushed-in plate, and is usedfor snapping the catch of the lock in a manner to be described.

The rear plate 8 has a push button 16 A night snap 10 is mounted 011 theplate and serves to lock the permutation mecha' 11lS111 of the look. A release 11 relieves the snap when desired, so as tomake it disconnect from the permutation mechanism. The various push buttons and keys pro ecl't through their respective plates'and thedoor into the casings and section so as to coact with the mechanism intended to be operated by them.

The inner casing 12 has the main latch mechanism of the lock. It has a latch 11 with its permutation slots to, coiled spring 4.6 and slots at? with guide pins to control the travel of the latch. A trip 48 serves as means for enabling the cam 17 of the handle bar to pull the latch back against the tension of the spring 46, so as to unlock the door, when the knob is turned.

An auxiliary resilient catch -19 catches in a slot 50 in the latch and to limit the movement of the latch. until the operation of the push buttons 6 or it; press on its levers 51 to take it out of the slot. The latch slides on a plate Each push button 1 operates a resilient pawl 25 that engages with its respective rack teeth and lifts the rack 26 in the false section 19. A resilient rest-raining member 24 is mounted over each pawl and serves to hold the respective. racks properly positioned after being acted upon by the pawls and push buttons. A. bar 31 rests against the front of the restraining members as indicated and is held by arms 54 pivoted at the sides and connected at the bottom by a bar 56 crossing. underneath as shown. The last bar is pressed upon by the push key 5 which is in the rear of the bar in the plate This casing is arranged with channels 18 adapted to receive the edge portions of the false section 19. The casing has a face plate 13 which is provided with a slot for the latch 14 and with projections 57 to catch on the bolt 21, when the false section is locked in the casing.

The upper portion of the casing is pro vided with a plate and electrical connections for causing an alarm if the combination of the lock is operated wrongly, the connections being arranged for in any conventional manner.

The false section 19 has a series of T bars 27 numbered 1, 2, 3, 4-, 5, 6 for identification and connected vertically to the back of the section with channels (38 formed between them to take the set keys 28 and the rack bases, so that they slide readily in them as described. The set keys have each a lip arranged to rest on the looking or supporting bar 29, when they are not raised by the oper ation of the racks. The set keys have a part 59 adapted to engage in the slots l5 of the latch to hold it from moving, while so placed.

The locking bar 29 is provided with slots 84: and guide pins to control its movement in a slanting direction as shown. "It has a catch 60 on its end portion that engages under the bolt 33 and locks the same when the lock is set, asshown in Fig. 6.

stop bar 35 limits the downward moveassen ment or position of the racks. A leaved spring member 30 projects beyond the false section and is stressed under pressure when the section is placed in the casing so as to tend to come out of the casing when the bolts holding the same in place are released.

The false section has a. face plate 2 3 arranged to close the door edge side of the lock. A tongue 22 is recessed in the face of the blatc 23 and Divots therein with an arm. 61 against the bolt 21, which it moves into an unlocking position when the tongue is raised as shown in Figure 5. The bolt is mounted on the face plate 23 and has lips 20 that engage on the projections on the face plate of the casing.

The operation oi. the device involves for three main -functions namely, locking, unlocking and removal, as well as several minor functions.

The process of locking requires the setting of the setkeys in the slots of the latch so that the latter cannot move, and placing the locking bar when the bolt 21 cannot be operated and the false section taken out. To produce this, the push but-ton 6 or 16 is operated to release the auxiliary catch and cause the latch to travel its full length, or in other words snap the catch. The key 5 is then pushed, which allows the racks and set keys to fall into place and lock the latch. Bar 29 is down so that the false section cannot be taken out.

The unlocking process, consists in raising the bar 9-9 by turning key 15 clockwise; pushing the push key 5 in so as to get the restraining members out of the way; and then lift tongue 22 so that the bolt 21 unlocks the false section from the casing. The spring member 30 will then help to push the false section out. When the false section is out the set keys and racks can be changed or interchanged as much as desired to change the combination of the lock. They lift right out and are interchangeable.

To work the combination in unlocking, the push buttons 4 are pushed, and made to raise the respective racks until they disengage the set keys out of the slots in the latch When this is done the handle or knob 7 is turned, the cam acting on the latch.

The other parts have been described and their functions indicated, which in connection with the drawings can be readily understood. The device is subject to many arrangements and conditions. It is of course understood that the false casing cannot be removed until the knob and handle bar is taken out, which is a comparatively simple manner.

Claims:

1. A look of the class described comprising in combination, a casing having a; latch mechanism therein and a face plate there for, permutation means, a falsesection insert-able in the casing having a plurality of devices for catching in the latch mechanism so as to lock the same in a predetermined. manner, said devices being actuated by said permutation means, means for latching said section in said casing, a plurality of buttons for actuating the permutation means accord ing to a predetermined arrangement, and push buttons for setting or resetting the permutation means, auxiliary means for detatching the permutation means from the buttons whereby it will become inoperable by said buttons, a supporting bar for the permutation means, and means for dogging the said section latching means for prevent ing the false section from being removed from the casing, and handle means for turn ing the latch.

A lock of the class described comprising in combination, a casing having a latch mechanism therein and a face plate therefor,

permutation means comprising slidable racks e in guides and plvoted pawls for controlhng the movement of the racks, a false section insertable in the casing having a plurality of set keys for catching in the latchmechai nism so as to lock the same in a predeternnned manner, said set keys being actuated by said permutation means, means for latching said section in said casing, a plurality of push buttons for actuating the permutation means according to a predetermined arrangement and buttons for setting or resetting the permutation means, auxiliary means for detaching the permutation means from the buttons whereby it Will become inmeans for unlocking the said dogging means at predetermined arrangements of the per: mutation means and parts connected therewith, and a handle mechanism for turning the latch. i s

In testimony whereof I hereunto afiix my signature.

DARIO ROBERTI. 

